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Name
  MV Lyr  
AAVSO UID
000-BCF-308 (52547 observations)  
Constellation
Lyra Sequence
J2000.0
19 07 16.29 +44 01 08.6  (286.81788 +44.01906) Search nearby
B1950.0 19 05 44.35 +43 56 22.1
Proper motion
RA: 0.1 +/- 1.8 mas/yDec: -4.8 +/- 1.7 mas/ySource: UCAC4
Galactic coord. 74.717 +15.824
Other names

(Internal only)
Please note that aliases shown in grey link to obsolete records.
1RXS J190716.8+440109 AAVSO 1904+43 ASAS J190716+4401.1
Downes MV Lyr KIC 8153411 KID 8153411
SVS 1021 X 1905-439  
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Variability type
NL/VY
Spectral type Op+M5V
Mag. range
12.2 - 18 B
Discoverer --
Epoch
--
Outburst --
Period 0.1329 d  (3.19 h)
Rise/eclipse dur. --
Remarks
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1 GCVS Team SB (Porb = 0.1336d [D.P.Schneider, P.Young, S.A.Shectman, ApJ 245, 644, 1981.]). Quasiperiodic fadings of different amplitude: Min = 2425558 + 455.5d*E (JD2425500 - 30100); Min = 2430113 + 325.3d*E (JD2430100 - 36900); Min = 2436944 + 357.8d*E (JD2436900 - 44100) [W.Wenzel, B.Furhmann, MVS 9, H.6, 1975, 1983.]. After JD2444100 the mean brightness level became fainter by 5m; outbursts with an amplitude up to 3m of 1 - 2 months duration are observed [I.L.Andronov, S.Yu.Shugarov, IBVS N2418, 1983.]. During the bright level of light, flickering up to 0.4m in 5 Min in U bAnd is observed [M.F.Walker, PASP 66, 71, 1954.]. Soft X-ray source. B - V: 0.00 +- 0.40; U - B: -0.86 + -1.30.
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References
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1 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 [astro-ph]		 2008arXiv0808.2558P
2 A. Pigulski, G. Pojmanski, B. Pilecki, D. Szczygiel, 2008,
arXiv:0808.2558v2 (online data)		 2008arXiv0808.2558P
3 R.A. Downes et al., 2001, PASP 113, 764 (2006 archival version) 2005JAD....11....2D
4 T. Kato, R. Ishioka, M. Uemura, 2002, PASJ 54, 1033 2002PASJ...54.1033K
5 R.A. Downes et al., 2001, PASP 113, 764 2001PASP..113..764D
6 W.Wenzel, B.Furhmann, MVS 9, H.6, 1975, 1983. --
7 M.F.Walker, PASP 66, 71, 1954. 1954PASP...66...71W
8 Catalogue of Stellar Spectral Classifications (Skiff, 2005) 1952ApJ...116..592M
9 Planet Hunters --
External Links
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Catalog Data
Information from selected catalogs obtained by cross-matching to 2 arc seconds using the CDS X-Match Service. These data may not be complete.
2MASS J = 15.87
AllWISE W1 = 12.48W2 = 12.36W3 = 12.09W1 - W2 = 0.12
APASS-DR9 B = 13.04V = 12.92g' = 12.86r' = 13.11i' = 13.20B - V = 0.12
Images
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Supporting Documents
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Campaigns/Programs
 Legacy CVs
Revision History
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3 Admin, VSX 2010-01-05 04:43 UTC Position updated from the GCVS version of November 2009.
2 Admin, VSX 2009-09-21 21:28 UTC Update from [2002PASJ...54.1033K].
1 Admin, VSX 2005-12-18 01:33 UTC Initial upload.

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